Griffin had initially been expected to meet Chael Sonnen
at the Dec. 29 event, but Sonnen was pulled from the contest so
that he could coach opposite light heavyweight champion Jon Jones on
Season 17 of “The Ultimate Fighter.” UFC 155 takes place at the MGM
Grand Garden Arena in Las Vegas and will be headlined by a
heavyweight championship rematch between Junior dos
Santos and Cain
Velasquez.

Griffin, 33, has won three of his last four fights. The original
“Ultimate Fighter” winner fought twice last year, outpointing
former middleweight champion Rich
Franklin at UFC 126 before suffering a first-round knockout in
his UFC 134 rematch with Mauricio
Rua. Most recently, Griffin faced fellow ex-light heavyweight
titlist Tito Ortiz in a
rubber match at UFC 148, taking a unanimous decision over the
Californian on July 7.

Davis, meanwhile, dominated Octagon newcomer Wagner
Prado in their UFC 153 rematch after their first fight at UFC
on Fox 4 ended in a no-contest due to an accidental eye-poke. A
former NCAA Division I national champion wrestler at Penn State
University, “Mr. Wonderful” overwhelmed Prado with his grappling
before submitting the Brazilian with an anaconda choke in the
second round of their Oct. 13 meeting in Rio de Janeiro.